HOW to connect Adafruit NeoPixel Digital RGB LED Weatherproo

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dachinzo
 
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HOW to connect Adafruit NeoPixel Digital RGB LED Weatherproo

Post by dachinzo »

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I recently purchased Arduino Uno and Adafruit NeoPixel Digital RGB LED Weatherproof Strip 60 LED -1m (WHITE) http://www.adafruit.com/products/1138

I want the all lights to be on, I very new to arduino world. Please help.
IMG_2985.JPG
IMG_2985.JPG (137.68 KiB) Viewed 564 times
IMG_2985.JPG
IMG_2985.JPG (137.68 KiB) Viewed 564 times
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IMG_2986.JPG (126.73 KiB) Viewed 564 times
Thank you very much for the responses.

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Franklin97355
 
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Re: HOW to connect Adafruit NeoPixel Digital RGB LED Weather

Post by Franklin97355 »

I'm pretty sure you need a ground connection to the Arduino from the strip. Check the info on the learning page or the product page, they should have instructions.

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pburgess
 
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Re: HOW to connect Adafruit NeoPixel Digital RGB LED Weather

Post by pburgess »

Affirmative -- common ground is essential.

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dachinzo
 
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Re: HOW to connect Adafruit NeoPixel Digital RGB LED Weather

Post by dachinzo »

I connected LED Strip GND to arduino GND(blue wire in the second picture), LED 5V to arduino 5V(red wire), LED Strip DI to arduino PIN 6(green wire).
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I uploaded Adafruit_NeoPixel strand test, but I couldn't get lights on.

What am I missing here? Please help


Thank you.

Code: Select all

#include <Adafruit_NeoPixel.h>

#define PIN 6

// Parameter 1 = number of pixels in strip
// Parameter 2 = pin number (most are valid)
// Parameter 3 = pixel type flags, add together as needed:
//   NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
//   NEO_KHZ400  400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
//   NEO_GRB     Pixels are wired for GRB bitstream (most NeoPixel products)
//   NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)
Adafruit_NeoPixel strip = Adafruit_NeoPixel(60, PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  strip.begin();
  strip.show(); // Initialize all pixels to 'off'
}

void loop() {
  // Some example procedures showing how to display to the pixels:
  colorWipe(strip.Color(255, 0, 0), 50); // Red
  colorWipe(strip.Color(0, 255, 0), 50); // Green
  colorWipe(strip.Color(0, 0, 255), 50); // Blue
  rainbow(20);
  rainbowCycle(20);
}

// Fill the dots one after the other with a color
void colorWipe(uint32_t c, uint8_t wait) {
  for(uint16_t i=0; i<strip.numPixels(); i++) {
      strip.setPixelColor(i, c);
      strip.show();
      delay(wait);
  }
}

void rainbow(uint8_t wait) {
  uint16_t i, j;

  for(j=0; j<256; j++) {
    for(i=0; i<strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel((i+j) & 255));
    }
    strip.show();
    delay(wait);
  }
}

// Slightly different, this makes the rainbow equally distributed throughout
void rainbowCycle(uint8_t wait) {
  uint16_t i, j;

  for(j=0; j<256*5; j++) { // 5 cycles of all colors on wheel
    for(i=0; i< strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
    }
    strip.show();
    delay(wait);
  }
}

// Input a value 0 to 255 to get a color value.
// The colours are a transition r - g - b - back to r.
uint32_t Wheel(byte WheelPos) {
  if(WheelPos < 85) {
   return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
  } else if(WheelPos < 170) {
   WheelPos -= 85;
   return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
  } else {
   WheelPos -= 170;
   return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
  }
}


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adafruit_support_bill
 
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Re: HOW to connect Adafruit NeoPixel Digital RGB LED Weather

Post by adafruit_support_bill »

The 5v pin on your Arduino is not going to have enough power to drive 1 meter of leds.

http://www.adafruit.com/products/1138#Description
First up, the higher density means much higher power usage over a certain distance - 18 Watts max (~3.5 Amps @ 5V) per meter instead of 9.6 Watts max (~2 Amps @ 5V). The max rating is assuming all the LEDs are on full white, usually the actual current for colorful design is about 1/3 to 1/2 the max current.
...
We have a 5V/2A supply that should be able to drive 1 meter (depending on use) and a 5V/10A supply that can drive up to 4 meters (depending on use) You must use a 5V DC power supply to power these strips, do not use higher than 6V or you can destroy the entire strip
http://www.adafruit.com/products/276

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rjpage
 
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Re: HOW to connect Adafruit NeoPixel Digital RGB LED Weather

Post by rjpage »

I am new to Arduino. I would like to create an outdoor Christmas display using the NeoPixel strip. The maximum voltage is 6 VDC. I have an old power supply for a laptop rated at 19.5 VDC and 90w (4.61 A). Is there any reason that I could not use 3 strips with the power divided between 3 circuits (6.5 VDC each) with 7805 5.0 VDC regulators?

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adafruit_support_bill
 
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Re: HOW to connect Adafruit NeoPixel Digital RGB LED Weather

Post by adafruit_support_bill »

You are better off with a good 5v regulated supply. Linear regulators like the 7805 are horribly inefficient if the input voltage is significantly higher than the regulated voltage. You will be dissipating 75% of the power as heat. The regulators will probably overheat trying to drive more than a few pixels.

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rjpage
 
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Re: HOW to connect Adafruit NeoPixel Digital RGB LED Weather

Post by rjpage »

I plan to build a 3way voltage divider (19.5 VDC/3) giving me 3 lines of 6.5 VDC (the regulator wants 6.5 to 7.0).

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adafruit_support_bill
 
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Re: HOW to connect Adafruit NeoPixel Digital RGB LED Weather

Post by adafruit_support_bill »

Unfortunately, voltage dividers don't work that way. Unless the current across each step of the divider is exactly equal, the voltage drop will not be equal either.

You need a good quality 5v regulated supply.

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